Effect of Supporting Electrolyte on Capacitance and Impedance Properties of Electrodeposited PEDOT/ERGO Electrodes for Supercapacitor

Authors : Tolga KARAZEHİR

Pages : 854-872

Doi:10.47495/okufbed.1218141

View : 11 | Download : 6

Publication Date : 2023-03-10

Article Type : Research Paper

Abstract :In this study, the ability of Poly insert ignore into journalissuearticles values(3,4-ethylenedioxythiophene);/electrochemically reduced graphene oxide insert ignore into journalissuearticles values(PEDOT/ERGO); electrodes for supercapacitors to store electrical energy is studied. PEDOT/ERGO electrodes are produced using a simple two-step electrochemical method that involves electrochemically reduction of graphene oxide, and then PEDOT is electrochemically deposited onto the ERGO in different electrolyte solutions. Electrochemical techniques such as cyclic voltammetry insert ignore into journalissuearticles values(CV);, galvanostatic charge discharge insert ignore into journalissuearticles values(GCD);, and electrochemical impedance spectroscopy insert ignore into journalissuearticles values(EIS); are utilized to investigate the electrochemical characteristics of PEDOT/ERGO electrodes produced in different electrolyte systems including 0.1 M lithium perchloride/acetonitrile insert ignore into journalissuearticles values(LiClO4/ACN);, tetraethylammoniumtetrafluoroborate/acetonitrile insert ignore into journalissuearticles values(Et4NBF4/ACN);, and tetrabutylammonium hexaflorophosphate/acetonitrile insert ignore into journalissuearticles values(Bu4NPF6/ACN);. The electrolyte type has a significant impact on electrochemical results. PEDOT/ERGO manufactured in LiClO4/ACN demonstrates a high specific capacitance insert ignore into journalissuearticles values(Csp); and low charge transfer resistance insert ignore into journalissuearticles values(Rct);. According to results, the Csp value is decreased in the following order; 26.48 mFcm-2 for LiClO4, 20.58 mFcm-2 for Et4NBF4, 8.96 mFcm-2 for Bu4NPF6.
Keywords : Poli 3 4 etilen dioksi tiyofen, , grafen, Süperkapasitör, Poly 3, 4ethylenedioxythiophene,